This trumpet befuddled the band director(and her trumpet playing band director husband) as to why it wasn’t playing well, and how they could feel air escaping. It took me a while, but I finally found the split in the leadpipe. In normal light it was very hard to see the split. Here’s how I fixed it:
Left Pic – Split in leadpipe…about 3 inches long
Right Pic – Sheet brass patch after cutting to preliminary shape
Left Pic – Patch cut to final shape
Right Pic – Lacquer removed and patch bent to contour of leadpipe
Left Pic – Other view of patch contoured to fit
Right Pic – Wire tied on leadpipe, prior to soldering
Left Pic – Soldered, but not cleaned up
Right Pic – Buffed and ready to go